[bug] org-agenda-diary-entry fails on redisplay of the agenda

[Eric Fraga <e.fraga@ucl.ac.uk>]

Hello,

sometime in the past few weeks, something has changed that has led
to problems inserting items in my diary from the agenda view, using
"i d" (org-agenda-diary-entry).  The traceback is

--8<---------------cut here---------------start------------->8---
Debugger entered--Lisp error: (wrong-type-argument sequencep t)
  mapcar((lambda (tg) (if (or (and hide-re (string-match hide-re tg)) (and (not add-inherited) (get-text-property 0 (quote inherited) tg))) nil tg)) t)
  (delq nil (mapcar (function (lambda (tg) (if (or (and hide-re (string-match hide-re tg)) (and (not add-inherited) (get-text-property 0 ... tg))) nil tg))) tags))
  (setq tags (delq nil (mapcar (function (lambda (tg) (if (or (and hide-re ...) (and ... ...)) nil tg))) tags)))
  (progn (if (string-match "\\([ 	]+\\)\\(:[[:alnum:]_@#%:]+:\\)[ 	]*$" txt) (setq txt (substring txt 0 (match-beginning 0)))) (setq tags (delq nil (mapcar (function (lambda (tg) (if (or ... ...) nil tg))) tags))) (if tags (progn (let ((have-i (get-text-property 0 (quote inherited) (car tags))) i) (setq txt (concat txt " :" (mapconcat (function ...) tags ":") (if have-i "::" ":")))))))
  (if (or add-inherited hide-re) (progn (if (string-match "\\([ 	]+\\)\\(:[[:alnum:]_@#%:]+:\\)[ 	]*$" txt) (setq txt (substring txt 0 (match-beginning 0)))) (setq tags (delq nil (mapcar (function (lambda (tg) (if ... nil tg))) tags))) (if tags (progn (let ((have-i (get-text-property 0 ... ...)) i) (setq txt (concat txt " :" (mapconcat ... tags ":") (if have-i "::" ":"))))))))
  org-agenda-fix-displayed-tags(#("test 3" 0 6 (org-heading t)) t t nil)
  (setq txt (org-agenda-fix-displayed-tags txt tags org-agenda-show-inherited-tags org-agenda-hide-tags-regexp))
  ...
  org-agenda-format-item(nil #("test 3" 0 6 (org-heading t)) nil nil t)
  org-agenda-add-entry-to-org-agenda-diary-file(day #("test 3" 0 6 (org-heading t)) (9 30 2012))
  ...
  org-agenda-diary-entry-in-org-file()
  ...
  org-agenda-diary-entry()
  call-interactively(org-agenda-diary-entry nil nil)
--8<---------------cut here---------------end--------------->8---

I've cut out some of the lines.

I cannot reproduce this with a minimal emacs so there is something in my
configuration that is causing the problem, I guess.  I should note that
I have set org-agenda-diary-file to point to an org file instead of the default
Emacs diary file and that file is based on a date-tree layout.

The actual entry does get inserted in the diary; it is the redisplay of
the agenda that fails.

Inserting into this diary has worked for yonks.

From vc-annotate, I can see that some lines near where the error occurs
were changed in the past month with commit 8365b738.  However, these
don't appear to be anything relevant; not that I can really say this
with any certainty, mind you :(.  Further searching doesn't highlight
anything obvious either.

Any advice or help would be welcome!

Thanks,
eric

-- 
: Eric S Fraga, GnuPG: 0xC89193D8FFFCF67D
: in Emacs 24.2.50.1 and Org release_7.9.1-452-g7d8a0c